tsarnaev is being held under heavy guard waiting to charge him. his injuries are serious, including a bullet wound to his neck that investigators say may have been self-inflicted. >> they say it appears from the wound that he might have stuck a gun in his mouth and fired. >> reporter: that could have happened when police found him hiding in a boat in watertown friday night. investigators released infrared video that shows him inside. >> i think all of the law enforcement professionals are hoping for a host of reasons that the suspect survived because we have a million questions. >> reporter: they include determining if johar and his brother tamerlan tsarnaev who was killed friday in a shoot out with police were so called lone wolves or had connections to a terrorist organization. the new york times reports tamerlan tsarnaev's application for u.s. citizenship was under review because a background check showed he was interviewed by the fbi in 2011 for possible ties to chechen terrorists. he was cleared but his uncle says tamerlan tsarnaev had been r